11212223112 has 48 divisors (see below), whose sum is σ = 32152702140. Its totient is φ = 3517559808.

The previous prime is 11212223063. The next prime is 11212223131. The reversal of 11212223112 is 21132221211.

It can be written as a sum of positive squares in 2 ways, for example, as 9681379236 + 1530843876 = 98394^2 + 39126^2 .

It is a super-2 number, since 2×11212223112² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4578933 + ... + 4581380.

Almost surely, 2^11212223112 is an apocalyptic number.

11212223112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11212223112 is an abundant number, since it is smaller than the sum of its proper divisors (20940479028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11212223112 is a wasteful number, since it uses less digits than its factorization.

11212223112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9160342 (or 9160335 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11212223112 its reverse (21132221211), we get a palindrome (32344444323).

The spelling of 11212223112 in words is "eleven billion, two hundred twelve million, two hundred twenty-three thousand, one hundred twelve".